react-native-foundations.skill

React Native coding guidance — consults official docs before writing code and suggests verification after. Use when writing components, implementing features, building screens, fixing queries, or adding views. Triggers on "write a component", "implement this feature", "build this screen", "add a view", "React Native code", "fix this query", "use best practices".

Audit accessibility of the running React Native app. Captures the accessibility tree from the iOS Simulator and checks it against React Native best practices. Triggers on "audit accessibility", "check a11y", "VoiceOver check", "accessibility issues", "screen reader test", "are labels correct".

Intelligent environment reset for React Native projects — diagnoses stale caches before cleaning instead of blindly nuking everything. Triggers on "clean build", "reset caches", "fresh start", "metro won't start", "build is broken", "nuclear clean", "clear derived data".

Debug React Native apps — view console logs, JS errors, Metro status, evaluate expressions, inspect React component tree, monitor network requests. Use for runtime debugging of JavaScript and React layers. Triggers on "console logs", "JS errors", "Metro status", "evaluate expression", "React component tree", "network requests", "debug".

Test deep links and URL schemes in the iOS Simulator. Reads navigation/linking config, constructs test URLs, fires them via xcrun simctl, and verifies the resulting screen. Triggers on "test deep link", "test this URL scheme", "verify navigation to", "does deeplink work", "open URL in simulator", "test universal link".

Diagnose React Native errors by cross-referencing error text against docs, error pattern database, and project config. Use for build failures, red screens, runtime crashes, and dependency issues. Triggers on "diagnose this error", "why is my build failing", "what does this red screen mean", "Unable to resolve module", "null is not an object", "Invariant Violation", "pod install failed", "gradlew failed", "EACCES", "metro error".

Search React Native official documentation. Use when answering questions about React Native APIs, components, hooks, layout, navigation, native modules, or platform-specific behavior. Triggers on "React Native", "RN docs", "how does View work", "FlatList props", "native module", "new architecture".

Control the iOS Simulator — tap, type, swipe, screenshot, record video, install and launch apps. Use when interacting with the iOS simulator during React Native development. Triggers on "simulator", "tap", "swipe", "screenshot of simulator", "install app", "launch app", "what's on screen", "record video", "accessibility tree", "tap by label", "tap by id", "list elements", "go back", "scroll to top", "scroll to bottom".

Verify visual layout against React Native Flexbox and style documentation. Captures the simulator screen in a subagent, analyzes element positions and spacing, and cross-references against official docs. Triggers on "does this look right", "check the layout", "why is this overflowing", "verify the spacing", "the UI looks wrong", "layout issue", "flexbox problem".